Boards in 15 GitHub repositories, designed in KiCad, that use the 74LS109PC by Texas Instruments (0ns 0℃~+70℃ 2 20ns、30ns 25MHz 25ns@5V,15pF、35ns@5V,50pF 4.75V~5.25V 400uA 74LS Series 8mA 8mA Asynchronous Complementary JK-Type Rising Edge Set and Reset - Flip Flops). See how each wires it, with its parts, size, README and files; the 74LS109PC’s symbol, footprint and pinout are on its own page.
Nakazoto/CenturionComputer
This is just a simple backup of all the files related to the Centurion that I have stored on my HD. The Wiki itself has far more in-depth information about the Centurion and it's individual cards.
SukkoPera/OpenC64WarpSpeed
Open Hardware Fast Loader cartridge for the Commodore 64 and 128 - DO NOT USE!!!
matiasmicheletto/openscad-oil-pumpjack
3d models and electronics for a variable speed scale pumpjack
ukmaker/VideoTrigger
My oscilloscope wouldn't trigger relibly on video signals, so I made this to help me work on my VDPtoTFT project.
schenkmi/electronic-retro-computing-projects
In revision 2, the PCB size has been reduced by more than 50% and TAPuino support has been ditched. It now features a Micro SD slot and a few other improvements.